Buscar
Mostrando ítems 1-10 de 113
Genomic evidence for homoploid hybrid speciation in a marine mammal apex predator
(American Association for the Advancement of Science, 2023)
Hybridization is widespread and constitutes an important source of genetic variability and evolution. In animals, its role in generating novel and independent lineages (hybrid speciation) has been strongly debated, with ...
Hypercarnivorous apex predator could provide ecosystem services by dispersing seeds
(Nature Publishing Group, 2016-01)
Large ?hypercarnivorous? felids are recognized for their role as apex predators and hence as key elements in food webs and ecosystem functioning through competition and depredation. Here we show that cougars (Puma concolor), ...
Field exclusion of large soil predators impacts lower trophic levels and decreases leaf-litter decomposition in dry forests
(Wiley Blackwell Publishing, Inc, 2019-09-08)
Shifts in densities of apex predators may indirectly affect fundamental ecosystem processes, such as decomposition, by altering patterns of cascading effects propagating through lower trophic levels. These top–down effects ...
An overview on the role of Hexanchiformes in marine ecosystems: Biology, ecology and conservation status of a primitive order of modern sharks
(Wiley Blackwell Publishing, Inc, 2012-04)
The large size, high trophic level and wide distribution of Hexanchiformes (cow and frilled sharks) should position this order as important apex predators in coastal and deep-water ecosystems. This review synthesizes ...
Dominant predators mediate the impact of habitat size on trophic structure in bromeliad invertebrate communities
(Ecological Soc Amer, 2015-02-01)
Local habitat size has been shown to influence colonization and extinction processes of species in patchy environments. However, species differ in body size, mobility, and trophic level, and may not respond in the same way ...
Dominant predators mediate the impact of habitat size on trophic structure in bromeliad invertebrate communities
(Ecological Soc Amer, 2015)
A unique predator in a unique ecosystem: modelling the apex predator within a Late Cretaceous crocodyliform-dominated fauna from Brazil
(2020-08-01)
Theropod dinosaurs were relatively scarce in the Late Cretaceous ecosystems of southeast Brazil. Instead, hypercarnivorous crocodyliforms known as baurusuchids were abundant and probably occupied the ecological role of ...
Comparative investigation into the morphology of oral papillae and denticles of four species of lamnid and sphyrnid sharks
(Springer, 2019-03-01)
The microstructures of the oral cavity in sharks have received relatively little study, despite their potential functional importance for gustation, feeding, and ventilation. Accordingly, here we conducted a preliminary ...
Anthropogenic food subsidies hinder the ecological role of wolves: insights for conservation of apex predators in human-modified landscapes
(Elsevier B.V., 2020-03)
In ecologically pristine ecosystems, top-down effects of apex predators play a fundamental role in shaping trophic cascades and structuring ecosystems, but in human-modified landscapes anthropogenic effects may markedly ...